Many genes are unique to the Y chromosome, but genes in areas known as pseudoautosomal regions are present on both sex chromosomes. As a result, men and women each have two functional copies of these genes.
Digital signal processor. A digital signal processor chip found in a guitar effects unit. A digital signal processor (DSP) is a specialized microprocessor (or a SIP block), with its architecture optimized for the operational needs of digital signal processing. The goal of DSPs is usually to measure, filter and/or compress continuous real-world analog signals.
Wikipedia does a good short articel about DSPs: Digital signal processor Finally, a case may be made that microcontrollers have changed little since the early days. Their applications are usually very specific, such as mouse controller, keyboard controllers, and have very little need for any complex math capabilities or special architectures.